Reuters reported that Mexican miner Grupo Mexico expects to produce 820,000 tonnes of copper in 2013 down 3.5% from its previous estimate.

Mr Xavier Garcia de Quevedo president Minera Mexico subsidiary said that Grupo Mexico sees copper output of between 900,000 and 910,000 tonnes in 2014 and expects production of about 1 million tonnes in 2015.

Mr Garcia de Quevedo said that "Our production this year is going to be very similar to last year's. By 2015 we should be talking about nearing 1 million tonnes of copper."

He said that 2014 investment should remain close to this year's USD 3.3 billion in spending with more than half of that going toward the company's mining division.

Grupo Mexico runs mines in Mexico, Peru and the United States including the Buenavista mine in northern Mexico, one of world's largest copper mines. The company, which has been hit by a fall in metals prices, also has infrastructure and transport divisions.